The subject contracts a horrible disease, which strikes immediately (no incubation period). The subject takes 1d6 points of Constitution damage per day. Each day he must attempt another save or take another 1d6 points of Constitution damage. Unlike normal diseases, this plague continues until the victim reaches Constitution 0 (and dies).

What is truly horrendous about this disease is that it spreads like wildfire. Anyone who touches, or is touched, by the subject, must make a save themselves or gain the plague (DC = 10 + half subject's HD + Con mod, minimum DC 10 and maximum DC cannot exceed original DC of the spell). These secondary subjects can now spread the plague and so on and so forth.

Those who successfully save against the black plague gain immunity to all further exposures of the black plague for a number of days equal to their constitution modifier. There is a 1% chance that those that make the save become carriers for as long as they have immunity.

The plague is a powerful curse, not a natural disease. Anyone attempting to cast any conjuration (healing) spell on a creature afflicted with the plague must succeed on an opposed caster level check against the original caster, or the spell has no effect on the afflicted character.

To eliminate the plague, the curse must first be broken with break enchantment or remove curse (requiring an opposed caster level check for either spell), after which a caster level check is no longer necessary to cast healing spells on the victim, and the plague can be magically cured as any normal disease.

An afflicted creature who dies of the plague is still a carrier. Unless the body is disposed of through burning, burial, or some other method, anyone who touches the corpse, or breathes the air within 5 feet of it, must make a DC 10 fortitude save. The corpse remains contagious for 1d4 days.